Re: Hardware Raid on Intel DG965OT Motherboard
On 5/04/2007 1:52 AM, Alexander Anderson wrote: Thu, Apr 05, 2007 at 08:52:44 AM, Antony Mawer wrote: I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 using Intel Matrix Storage. It seems to work fine. You may want to re-think that option... according to the ataraid(4) man page, RAID5 is not functional (ie. you have about as much data safety as a RAID0 stripe set does): CAVEATS RAID5 is not supported at this time. Code exists, but it neither uses nor maintains parity information. The ataraid driver provides *software* RAID. But doesn't Intel Matrix Storage gives *hardware* RAID support? How could I tell if software is at play? I'm fairly certain that all ar# devices (ar0, etc) are ataraid-powered, and thus are software RAID. If it is a hardware RAID device, typically the RAID controller presents a single drive (or one drive for each RAID volume) to the OS, and the OS can be ignorant of the number of underlying drives. Also, from man ataraid: The ataraid driver can read the following metadata formats: ... o Intel MatrixRAID Which suggests that is is, indeed, just a software RAID setup. That is, the BIOS-based bit just writes configuration metadata to the drives, and its up to drivers at the OS level to perform the actual RAID operations using that data. --Antony ___ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hardware Raid on Intel DG965OT Motherboard
Thu, Apr 05, 2007 at 08:52:44 AM, Antony Mawer wrote: I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 using Intel Matrix Storage. It seems to work fine. You may want to re-think that option... according to the ataraid(4) man page, RAID5 is not functional (ie. you have about as much data safety as a RAID0 stripe set does): CAVEATS RAID5 is not supported at this time. Code exists, but it neither uses nor maintains parity information. The ataraid driver provides *software* RAID. But doesn't Intel Matrix Storage gives *hardware* RAID support? How could I tell if software is at play? One drive failure and you will be in for a whole world of hurt... I was going to do a test and simulate a drive failure (and see how to rebuild the array). I haven't had a chance to try that yet. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hardware Raid on Intel DG965OT Motherboard
Tue, Apr 03, 2007 at 05:22:22 PM, Ivan Carey wrote: Is there hardware support for this Motherboard Intel DG965OT Motherboard in FreeBSD 6.2 I have read the Hardware notes but am unable to determine if FreeBSD 6.2 is compatible with Intel DG965OT Motherboard and the on board Martix Storage Technology I would like to setup a Raid 1 http://www.intel.com/products/motherboard/DG965OT/index.htm http://www.intel.com/products/motherboard/DG965OT/index.htm Also are the any concise instruction on how to setup hardware raid 1? I have searched the net I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 using Intel Matrix Storage. It seems to work fine. When you set it up, you first have to create a RAID array. When your machine boots, right after (or before?) you see the screen that takes you to the BIOS configuration, you'll be prompted to press Ctrl-I (IIRC) and you'll be taken to RAID controller configuration screen. It's really straightforward how to create a new array. Then, when you boot FreeBSD, you should look at dmesg output. Mine looks like this: ad4: 305245MB Seagate ST3320620AS 3.AAJ at ata2-master SATA150 ad6: 305245MB Seagate ST3320620AS 3.AAJ at ata3-master SATA150 ad8: 305245MB Seagate ST3320620AS 3.AAJ at ata4-master SATA150 ad10: 305245MB Seagate ST3320620AS 3.AAJ at ata5-master SATA150 ar0: 915729MB Intel MatrixRAID RAID5 (stripe 64 KB) status: READY ar0: disk0 READY using ad4 at ata2-master ar0: disk1 READY using ad8 at ata4-master ar0: disk2 READY using ad6 at ata3-master ar0: disk3 READY using ad10 at ata5-master FreeBSD installer asked me what drive I wanted to install it to: ad4, ad6, ad8, ad10, or ar0. Of course, I chose ar0. (The second on-board RAID controller, Marvell 88SE6145, seems to be unsupported under FreeBSD 6.2, unfortunately. It gave me quite some trouble. But that's another topic.) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hardware Raid on Intel DG965OT Motherboard
On 4/04/2007 9:30 PM, Alexander Anderson wrote: I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 using Intel Matrix Storage. It seems to work fine. ... ad4: 305245MB Seagate ST3320620AS 3.AAJ at ata2-master SATA150 ad6: 305245MB Seagate ST3320620AS 3.AAJ at ata3-master SATA150 ad8: 305245MB Seagate ST3320620AS 3.AAJ at ata4-master SATA150 ad10: 305245MB Seagate ST3320620AS 3.AAJ at ata5-master SATA150 ar0: 915729MB Intel MatrixRAID RAID5 (stripe 64 KB) status: READY ar0: disk0 READY using ad4 at ata2-master ar0: disk1 READY using ad8 at ata4-master ar0: disk2 READY using ad6 at ata3-master ar0: disk3 READY using ad10 at ata5-master You may want to re-think that option... according to the ataraid(4) man page, RAID5 is not functional (ie. you have about as much data safety as a RAID0 stripe set does): CAVEATS RAID5 is not supported at this time. Code exists, but it neither uses nor maintains parity information. One drive failure and you will be in for a whole world of hurt... --Antony ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Hardware Raid on Intel DG965OT Motherboard
Alexander Anderson wrote: Tue, Apr 03, 2007 at 05:22:22 PM, Ivan Carey wrote: Is there hardware support for this Motherboard Intel DG965OT Motherboard in FreeBSD 6.2 I have read the Hardware notes but am unable to determine if FreeBSD 6.2 is compatible with Intel DG965OT Motherboard and the on board Martix Storage Technology I would like to setup a Raid 1 http://www.intel.com/products/motherboard/DG965OT/index.htm http://www.intel.com/products/motherboard/DG965OT/index.htm Also are the any concise instruction on how to setup hardware raid 1? I have searched the net I have Intel D975XBX2 with two on-board SATA RAID controllers: one is Intel Matrix and the other is Marvell storage. I have FreeBSD 6.2 with RAID-5 using Intel Matrix Storage. It seems to work fine. When you set it up, you first have to create a RAID array. When your machine boots, right after (or before?) you see the screen that takes you to the BIOS configuration, you'll be prompted to press Ctrl-I (IIRC) and you'll be taken to RAID controller configuration screen. It's really straightforward how to create a new array. Then, when you boot FreeBSD, you should look at dmesg output. Mine looks like this: ad4: 305245MB Seagate ST3320620AS 3.AAJ at ata2-master SATA150 ad6: 305245MB Seagate ST3320620AS 3.AAJ at ata3-master SATA150 ad8: 305245MB Seagate ST3320620AS 3.AAJ at ata4-master SATA150 ad10: 305245MB Seagate ST3320620AS 3.AAJ at ata5-master SATA150 ar0: 915729MB Intel MatrixRAID RAID5 (stripe 64 KB) status: READY ar0: disk0 READY using ad4 at ata2-master ar0: disk1 READY using ad8 at ata4-master ar0: disk2 READY using ad6 at ata3-master ar0: disk3 READY using ad10 at ata5-master FreeBSD installer asked me what drive I wanted to install it to: ad4, ad6, ad8, ad10, or ar0. Of course, I chose ar0. (The second on-board RAID controller, Marvell 88SE6145, seems to be unsupported under FreeBSD 6.2, unfortunately. It gave me quite some trouble. But that's another topic.) ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] Alexander thanks for the info, How do you know when a drive has failed and how do you rebuild the array, Is this done in the bios or in FreeBSD? Thnaks, Ivan ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Hardware Raid on Intel DG965OT Motherboard
Is there hardware support for this Motherboard Intel DG965OT Motherboard in FreeBSD 6.2 I have read the Hardware notes but am unable to determine if FreeBSD 6.2 is compatible with Intel DG965OT Motherboard and the on board Martix Storage Technology I would like to setup a Raid 1 http://www.intel.com/products/motherboard/DG965OT/index.htm http://www.intel.com/products/motherboard/DG965OT/index.htm Also are the any concise instruction on how to setup hardware raid 1? I have searched the net Thanks, Ivan ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
